[CentOS] Problem with widescreen display
little.owl at email.cz
Tue Nov 4 21:55:02 UTC 2008
It is really strange, I would expect problems with FC4. Could you send
your xorg.conf and describe your graphic hardware?
Marko Vojinovic wrote:
> I have a dual boot CentOS 5.2 / FC4 machine, and recently I have bought a new
> widescreen tft monitor. I used to use a plain 4:3 crt, and after plugging the
> 16:9 tft naturally X needed reconfiguring. This was easy in FC4, and seemed
> as easy in CentOS, but with a wrong result.
> Basically, what I did was to run system-config-display to reconfigure for the
> new monitor and resolution. All goes well, but after X restarts, I see a
> strange picture: the resolution indeed goes to 1680x1050 as is supposed to,
> but is squeezed/shrinked/scaled horizontally to match a 4:3 aspect ratio,
> leaving two (unequal) black bands on the left and right side of the monitor.
> This is specific to 1680x1050 resolution, while lower ones display ok up to
> the fact that the virtual screen is usually bigger than the displayed part so
> scrolling is necessarry (and this is annoying, for I cannot see the panel and
> the top of the window simultaneously).
> The very same hardware and virtually same X configuration work perfectly ok on
> FC4, which suggests that this is not a hardware problem, nor an X problem.
> Further, as I see, FC4 has older version of virtually all software than
> I have tried various acrobatics with xorg.conf, but nothing helped; read
> Xorg.0.log inside out and back, compared to FC4, and everything seems
> essentially identical. X seems to work as everything is ok, so is mplayer
> (even in fullscreen), but the black bands remain there and the whole desktop
> is scaled to 4:3. The monitor "autoadjust" button also doesn't help (although
> it works in general).
> I'm out of ideas where to look for the cause of this. If you wish, I can post
> xorg.conf and log files from both OSes, but they are mainly identical and I
> see nothing suspicious.
> Btw, this is on an nVidia GeForce 4 using the default nv driver. The vesa
> driver doesn't support widescreen resolutions, while nvidia binary driver
> crashes X completely on start (but this is a known motherboard problem common
> to FC4 as well).
> Is there some kernel setting or whatever that might "force" the graphics card
> to 4:3 aspect irrespective of X configuration? Some "filter" between what X
> tries to display and the actual signal to the monitor? What else can I try?
> Any advice appreciated!
> Best, :-)
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